EP2400192A2 - Ventilation valve - Google Patents
Ventilation valve Download PDFInfo
- Publication number
- EP2400192A2 EP2400192A2 EP20110168059 EP11168059A EP2400192A2 EP 2400192 A2 EP2400192 A2 EP 2400192A2 EP 20110168059 EP20110168059 EP 20110168059 EP 11168059 A EP11168059 A EP 11168059A EP 2400192 A2 EP2400192 A2 EP 2400192A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- float
- vent
- housing
- transverse wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
- F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03519—Valve arrangements in the vent line
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7358—By float controlled valve
Definitions
- the invention relates to a vent valve for the fuel tank of a motor vehicle, in particular one with a gasoline engine.
- a vent valve for the fuel tank of a motor vehicle, in particular one with a gasoline engine.
- Such a valve comprises a housing with a vent opening, a float movably mounted in the housing in the direction of its central longitudinal axis and a sealing element held on the float.
- ventilation ventilation
- the float prevents the escape of fuel into the environment. If, during vehicle operation, such as when cornering, the fuel sloshes, the float is raised and moved to its closed position, in which he presses the sealing element to the vent opening or against a comprehensive this sealing seat.
- an overpressure relative to the atmosphere often builds up in the tank interior, so that the sealing element is acted upon from the interior of the tank with a compressive force which results from the magnitude of the overpressure and the area of the vent opening.
- This force counteracts the force exerted by the float on the sealing element opening force, so that the sealing element only delays or in extreme cases does not dissolve at all from the vent.
- the object of the invention is to propose a vent valve, which ensures reopening even at relatively high internal pressures of the tank and rapid pressure reduction in the tank interior.
- a vent opening which has a total of the circular shape deviating opening contour and extending away from the fixing point end portion whose clear width increases with increasing distance from the fixing point.
- the clear width is measured transversely to an imaginary center plane which intersects the fixation center and which includes the central longitudinal axis of the float.
- the laterally narrowed end portion of the vent opening has a small or smaller clear widths than an adjoining, farther from the fixing point area, he has a correspondingly reduced area, so that at a given internal tank pressure for opening, ie for removing the sealing element
- the force required by the end portion or a sealing seat which surrounds the latter is less than that which is the case, for example, in the case of a circular vent opening.
- the vent valve has a pressure-holding function. This is generally ensured by a vent controlled by a closing body, which closes by gravity existing in a housing transverse wall vent opening.
- the closing body is often designed as a closing ball, wherein a supporting him top of the housing transverse wall is designed so that the closing ball by gravity rolls to the vent opening and closes it. If fuel is then refilled into the tank via a filler neck present on the latter, the closing body counteracts the gas displaced from the tank by increasing the internal tank pressure. The increased pressure in the tank causes towards the end of the refueling operation, i. when a level limit valve present in or on the tank closes due to the increased fuel level to a certain level, the fuel rises in the filler neck and triggers the shutdown of the fuel nozzle.
- a second vent opening controlled by the closure body is provided which is fluidically connected to the vent opening controlled by the float and is arranged on a separate transverse wall of the valve housing.
- the upper side of the transverse wall is designed such that the closing ball, due to gravity, rolls to the vent opening, which has a circular opening contour, and closes it.
- vent opening In a second preferred embodiment, only one vent opening is present, which is closed by the top of a transverse wall carrying it from a closing body, wherein in a particularly preferred embodiment, the vent opening has different opening contours.
- the opening contour on the side facing the sealing element of the transverse wall penetrated by the vent opening is designed as described above, whereby a rapid reopening of the vent opening is ensured.
- the opening contour on the other side, the top of the transverse wall is circular, so that it can be closed by a closing ball. In contrast to the former embodiment, no two separate transverse walls are thus required, whereby the manufacturing and assembly costs are reduced.
- a valve housing with a transverse wall, which is penetrated by a preferably two different opening contours having vent opening, can be produced in a simple manner as an injection molded part.
- a housing with two axially spaced, each carrying an opening transverse walls would not be produced so that one of the two transverse walls would have to be attached as a separate part to the valve housing.
- the vent opening is designed mirror-symmetrically with respect to the above-mentioned imaginary center plane. This ensures that the sealing element is acted upon by the same internal force on both sides of the plane of the tank internal pressure and, accordingly, evenly charged from the vent in the opening direction moving float and tilting with respect to its central longitudinal axis is prevented. An uneven load The float carries the risk of jamming in the valve body.
- a breather valve of the type according to the invention comprises, as best Fig. 1 and Fig. 4 can be seen, a housing 2, which consists of a flange 3 and a connecting piece 11 having upper housing part 4 and a float 5 receiving the lower housing part 6.
- the lower housing part protrudes through an opening 7 of the upper wall 8 of a fuel tank into its interior 9 ( Fig. 4 ).
- the lower housing part 6 is of an approximately cylindrical, a Schwappschutz forming and openings 13 openwork wall 10 surrounded with radial clearance.
- the lower housing part 6 is also pierced by a plurality of openings 14, which allow an exchange of fuel and gas between the tank interior 9 and the interior of the housing 2.
- the float 5 is movably mounted in the direction of the central longitudinal axis 16 of the housing 2.
- at least one axial groove 17 is provided in an upper portion of the circumferential surface thereof into which an axial bar (not shown) engages the inside of the lower housing part 6.
- the top 18 of the float 5 is formed substantially flat and extends transversely to the central longitudinal axis 19 of the float.
- the float 5 has a central, opening in its underside bore 20, at the bottom of an axially extending central guide rod 23 is formed.
- the guide rod 23 protrudes into a hollow cylindrical projection 24, which extends axially away from the underside of the housing part 6.
- the projection 24 is encompassed by the lower end of a coil spring 25 which is supported with its one end to a lower wall 26 of the housing part 6 and with its other end within the bore 20 on the float 5.
- the housing part 6 is bounded on the upper side by a transverse wall 27, which is interrupted by a vent opening 28 fluidly connected to the connecting piece 11. This is arranged in the transverse wall 27, that it is penetrated by the central longitudinal axis 16 of the housing 2.
- the vent opening 28 is controlled by a fixed to the top 18 of the float 5 sealing element 29.
- the sealing element 29 is a flexible membrane, for example made of a polymeric material and has a sealing area 30 that is sized to completely cover the vent opening 28.
- the vent opening 28 is bounded by an axially projecting from the bottom of the transverse wall 27 sealing seat 33.
- a fixing portion 34 is formed, with which the sealing element 29 is fixed to the float 5 at a fixing point 35. This is - viewed in plan view in the direction of the central longitudinal axis 19 of the float 5 - radially outside the vent opening 28, is thus arranged eccentrically with respect to the central longitudinal axis 19 of the float 5.
- the vent opening 28 has a deviating from the circular shape opening contour.
- an end portion 39 extending away from the fixing point 35 is narrowed, for example, wedge-shaped or slot-shaped, with its clear width 36 as an opening portion extending away therefrom.
- the clear width 36 is measured transversely to an imaginary center plane 37, which intersects the fixing point 35 in the middle and which includes the central longitudinal axis 16 of the float 5.
- the vent opening 28 is due to this configuration with respect to a perpendicular to the imaginary center plane 37 extending and the central longitudinal axis 16 of the float 5 containing level 41 is not mirror-symmetrical.
- the adjoining the narrowed end portion 39 remaining opening portion 38 may ultimately be designed arbitrarily, provided that its clear width 36 at least in a subsequent to the narrowed end portion 39, for example, to the central longitudinal axis 19 of the float 5 extending longitudinal section 42 increases, so that after the sealing element 29 is withdrawn from the narrowed end portion 39, as soon as possible the remaining opening portion 38 is released and thereby a high gas flow rate is ensured ( Fig. 6-9 ).
- the narrowed end portion 39 can - in the plan view accordingly FIGS. 11 and 12 seen - be slit-shaped or in the form of a tapering to the fixing point wedge.
- Vent opening shown 28 has approximately a teardrop shape, wherein the narrowed end portion 39 is slot-shaped and merges with a rounded edge portion 58 in the remaining opening portion 38 which is substantially circular.
- the narrowed end portion 39 is wedge-shaped. The wedge shape is continued in the remaining opening area 38 continuously, ie, the clear width 36 increases steadily with increasing distance to the fixation until finally the edge of the vent opening 28 assumes a circular arc shape.
- Be2 the in Fig. 11 the vented end portion 39 is also wedge-shaped, but the remaining opening portion has approximately the shape of a rectangle whose longitudinal sides extend transversely to the imaginary center plane 37.
- Fig. 4 the vent valve is shown in the closed state.
- the sealing region 30 of the sealing element 29 lies completely against the sealing seat 33, so that the vent opening 28 is closed.
- a recess 43 is present in the Top 18 of the float is below the sealing region 30 of the sealing element 29, a recess 43 is present.
- the sealing element 29 and its sealing area 30, starting from the in Fig. 5 shown situation moved around the distance 44 when the float abuts with its top 18 on the extensions 40.
- the vent valve can only open when the pressure in the interior 9 of a fuel tank drops so far that the weight of the float 5 is sufficient to peel the sealing element from the narrowed end portion 39. Since this section, in particular at its end closest to the fixing point 35, has only a slight clear width 36, even a fraction of the total weight force of the float 5 is sufficient to move the sealing element 39 away from the sealing seat ( Fig. 6 ). Gas can now flow outward through the vent opening 28 via the end section 39 and the pressure in the tank interior 9 is reduced.
- the valve shown in the drawings has a pressure holding function.
- a closing ball 45 is present.
- the top of the transverse wall 27 has a funnel-shaped, the closing ball 45 holding recess 46, at its lowest point the vent opening 28 is arranged.
- From the upper side of the transverse wall 27 there are a plurality of circumferentially spaced approximately radially extending ribs 21, which terminate at a radial distance in front of the vent opening 28.
- the closing ball 45 sealingly abuts.
- the weight of the closing ball 45 is dimensioned so that a certain minimum pressure is always present in the tank interior 9.
- the minimum pressure is used, as already described above, to enable the shutdown of a fuel nozzle towards the end of a refueling operation.
- the vent 28 has a substantially circular cylindrical, the transverse wall 27 axially passing through opening portion 38 with nikbogenförmigem edge, which narrows in the direction of the fixing point 35 toward the slot-shaped or wedge-shaped tapered end portion 39.
- the end section 39 is closed on the upper side by a wall region 47 of the transverse wall 27 projecting into the vent opening 28.
- a vent valve with pressure-holding function in which, although also in a transverse wall 27, a vent opening 28a is present.
- the vent opening 28a can thus not be closed by a closure ball 45 to maintain a pressure holding function.
- a second transverse wall 49 is provided above the transverse wall 27, the upper side of a funnel-shaped recess 46, and which is penetrated by a central vent opening 50 with a circular opening contour, which cooperates with the closure ball 45.
- the transverse wall 49 in the embodiment according to Fig. 13 a separate part that must be connected to the lower housing part 6a gas or pressure tight.
- a radially upwardly projecting skirt 54 is formed with the edge 55 folded downwards.
- the edge 55 is so far away radially from the skirt 54, that a groove 56 is formed, in which a molded-on the top of the transverse wall 27 collar 57 is gas or pressure-tight.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
Description
Die Erfindung betrifft ein Entlüftungsventil für den Kraftstofftank eines Kraftfahrzeugs, insbesondere eines solchen mit einem Ottomotor. Ein solches Ventil umfasst ein Gehäuse mit einer Entlüftungsöffnung, einen im Gehäuse in Richtung von dessen Mittellängsachse beweglich gelagerten Schwimmer und ein am Schwimmer gehaltenes Dichtelement. Ein solches Ventil soll eine Be- und Entlüftung des Tanks (im Folgenden wird vereinfachend nur von Belüftung gesprochen) vor allem während des Fahrzeugbetriebs gewährleisten. Durch den Schwimmer wird ein Austritt von Kraftstoff in die Umgebung verhindert. Wenn während des Fahrzeugbetriebs, etwa bei einer Kurvenfahrt, der Kraftstoff hochschwappt, wird der Schwimmer angehoben und in seine Schließstellung bewegt, in der er das Dichtelement an die Entlüftungsöffnung bzw. gegen einen diese umfassenden Dichtsitz drückt. Dabei baut sich häufig im Tankinnenraum ein Überdruck gegenüber der Atmosphäre auf, so dass das Dichtelement vom Tankinnenraum her mit einer Druckkraft beaufschlagt wird, die sich aus der Größe des Überdrucks und der Fläche der Entlüftungsöffnung ergibt. Diese Kraft wirkt der vom Schwimmer auf das Dichtelement ausgeübten Öffnungskraft entgegen, so dass das Dichtelement sich nur verzögert oder im Extremfall überhaupt nicht von der Entlüftungsöffnung löst.The invention relates to a vent valve for the fuel tank of a motor vehicle, in particular one with a gasoline engine. Such a valve comprises a housing with a vent opening, a float movably mounted in the housing in the direction of its central longitudinal axis and a sealing element held on the float. Such a valve is intended to ensure ventilation of the tank (in the following, for simplification purposes, this is only referred to as ventilation), especially during vehicle operation. The float prevents the escape of fuel into the environment. If, during vehicle operation, such as when cornering, the fuel sloshes, the float is raised and moved to its closed position, in which he presses the sealing element to the vent opening or against a comprehensive this sealing seat. In this case, an overpressure relative to the atmosphere often builds up in the tank interior, so that the sealing element is acted upon from the interior of the tank with a compressive force which results from the magnitude of the overpressure and the area of the vent opening. This force counteracts the force exerted by the float on the sealing element opening force, so that the sealing element only delays or in extreme cases does not dissolve at all from the vent.
Aufgabe der Erfindung ist es, ein Entlüftungsventil vorzuschlagen, welches ein Wiederöffnen schon bei relativ hohen Tankinnendrücken und einen schnellen Druckabbau im Tankinnenraum gewährleistet.The object of the invention is to propose a vent valve, which ensures reopening even at relatively high internal pressures of the tank and rapid pressure reduction in the tank interior.
Diese Aufgabe wird bei einem Ventil der eingangs genannten Art dadurch gewährleistet, dass eine Entlüftungsöffnung vorgesehen ist, welche eine insgesamt von der Kreisform abweichende Öffnungskontur hat und einen sich von der Fixierstelle weg erstreckenden Endabschnitt aufweist, dessen lichte Breite mit zunehmenden Abstand von der Fixierstelle zunimmt. Die lichte Breite ist dabei quer zu einer gedachten Mittelebene gemessen, welche die Fixierstelle mittig schneidet und welche die Mittellängsachse des Schwimmers beinhaltet. Dadurch, dass der seitlich verengte Endabschnitt der Entlüftungsöffnung eine kleine oder kleinere lichte Breiten aufweist als ein sich daran anschließender, weiter von der Fixierstelle entfernter Bereich, hat er eine entsprechend verringerte Fläche, so dass die bei gegebenem Tankinnendruck zum Öffnen, d.h. zum Abziehen des Dichtelements von dem Endabschnitt bzw. eines diesen umgrenzenden Dichtsitzes erforderliche Kraft geringer ist, als dies etwa bei einer kreisrunden Entlüftungsöffnung der Fall ist. Sobald sich das Dichtelement erst einmal von dem Endabschnitt zu lösen beginnt, kann Gas, worunter ein Kraftstoffdampf - Luftgemisch zu verstehen ist, aus dem Tankinnenraum unter Absenkung des Innendrucks nach außen strömen. Die Druckabsenkung wird nun aber dadurch erheblich beschleunigt, dass die lichte Weite der Entlüftungsöffnung mit zunehmenden Abstand zur Fixierstelle und dementsprechend der vom Dichtelement freigegebene Strömungsquerschnitt der Entlüftungsöffnung und der sie durchsetzende Gasstrom im Vergleich zu einer schlitzförmigen, eine gleichbleibende lichte Breite aufweisenden Entlüftungsöffnung wesentlich stärker zunimmt. Die Folge ist ein schnelles Wiederöffnen des Ventils und ein schneller Druckabbau im Tankinnenraum.This object is ensured in a valve of the type mentioned in that a vent opening is provided, which has a total of the circular shape deviating opening contour and extending away from the fixing point end portion whose clear width increases with increasing distance from the fixing point. The clear width is measured transversely to an imaginary center plane which intersects the fixation center and which includes the central longitudinal axis of the float. Characterized in that the laterally narrowed end portion of the vent opening has a small or smaller clear widths than an adjoining, farther from the fixing point area, he has a correspondingly reduced area, so that at a given internal tank pressure for opening, ie for removing the sealing element The force required by the end portion or a sealing seat which surrounds the latter is less than that which is the case, for example, in the case of a circular vent opening. As soon as the sealing element begins to separate from the end section, gas, by which a fuel vapor-air mixture is to be understood, can flow out of the interior of the tank while lowering the internal pressure. The pressure reduction is now considerably accelerated by the fact that the clear width of the vent increases with increasing distance to the fixing point and accordingly released by the sealing element flow cross-section of the vent and the gas stream passing through them compared to a slot-shaped, a constant clear width having vent significantly more. The result is a quick reopening of the valve and a rapid pressure reduction inside the tank.
Bei einer weiteren bevorzugten Ausgestaltung weist das Entlüftungsventil eine Druckhaltefunktion auf. Diese wird allgemein durch eine von einem Schließkörper gesteuerten Entlüftungsöffnung gewährleistet, welcher schwerkraftbedingt eine in einer Gehäusequerwand vorhandene Entlüftungsöffnung verschließt. Der Schließkörper ist vielfach als Schließkugel ausgebildet, wobei eine ihn tragende Oberseite der Gehäusequerwand so gestaltet ist, dass die Schließkugel schwerkraftbedingt zur Entlüftungsöffnung rollt und diese verschließt. Wird nun Kraftstoff über einen an diesem vorhandenen Einfüllstutzen in den Tank nachgefüllt, setzt der Schließkörper dem aus dem Tank verdrängten Gas einen den Tankinnendruck erhöhenden Widerstand entgegen. Der erhöhte Druck im Tank bewirkt, dass gegen Ende des Betankungsvorgangs, d.h. wenn ein im oder am Tank vorhandenes Füllstandbegrenzungsventil auf Grund des auf eine bestimmte Höhe gestiegenen Kraftstoffpegels schließt, der Kraftstoff im Einfüllstutzen hochsteigt und das Abschalten der Zapfpistole auslöst.In a further preferred embodiment, the vent valve has a pressure-holding function. This is generally ensured by a vent controlled by a closing body, which closes by gravity existing in a housing transverse wall vent opening. The closing body is often designed as a closing ball, wherein a supporting him top of the housing transverse wall is designed so that the closing ball by gravity rolls to the vent opening and closes it. If fuel is then refilled into the tank via a filler neck present on the latter, the closing body counteracts the gas displaced from the tank by increasing the internal tank pressure. The increased pressure in the tank causes towards the end of the refueling operation, i. when a level limit valve present in or on the tank closes due to the increased fuel level to a certain level, the fuel rises in the filler neck and triggers the shutdown of the fuel nozzle.
Es werden nun zwei verschiedene Ausführungsvarianten zur Realisierung einer Druckhaltefunktion vorgeschlagen. Bei einer Ausführungsvariante ist eine von dem Verschlusskörper gesteuerte zweite Entlüftungsöffnung vorhanden, die mit der vom Schwimmer gesteuerten Entlüftungsöffnung fluidisch verbunden und ist an einer separaten Querwand des Ventilgehäuses angeordnet ist. Im Falle eines als Schließkugel ausgebildeten Schließkörpers ist die Oberseite der Querwand so gestaltet, dass die Schließkugel schwerkraftbedingt zur Entlüftungsöffnung, die eine kreisrunde Öffnungskontur aufweist, rollt und diese verschließt.There are now proposed two different embodiments for the realization of a pressure holding function. In one embodiment variant, a second vent opening controlled by the closure body is provided which is fluidically connected to the vent opening controlled by the float and is arranged on a separate transverse wall of the valve housing. In the case of a closing body designed as a closing ball, the upper side of the transverse wall is designed such that the closing ball, due to gravity, rolls to the vent opening, which has a circular opening contour, and closes it.
Bei einer zweiten bevorzugten Ausführungsvariante ist nur eine Entlüftungsöffnung vorhanden, die von der Oberseite einer sie tragenden Querwand her von einem Schließkörper verschlossen ist, wobei bei einer besonders bevorzugten Ausgestaltung die Entlüftungsöffnung unterschiedliche Öffnungskonturen aufweist. Die Öffnungskontur auf der dem Dichtelement zugewandten Seite der von der Entlüftungsöffnung durchsetzten Querwand ist so ausgestaltet wie oben beschrieben, wodurch ein schnelles Wiederöffnen der Entlüftungsöffnung gewährleistet ist. Die Öffnungskontur auf der anderen Seite, der Oberseite der Querwand, ist dagegen kreisrund, so dass sie von einer Schließkugel verschließbar ist. Im Gegensatz zur erstgenannten Ausführungsvariante sind somit keine zwei separaten Querwände erforderlich, wodurch der Herstellungs- und der Montageaufwand verringert sind. Ein Ventilgehäuse mit einer Querwand, die von einer vorzugsweise zwei unterschiedliche Öffnungskonturen aufweisenden Entlüftungsöffnung durchsetzt ist, lässt sich auf einfache Weise als Spritzgussteil herstellen. Dagegen wäre ein Gehäuse mit zwei axial beabstandeten, jeweils eine Öffnung tragenden Querwänden so nicht herstellbar, so dass eine der beiden Querwände als separates Teil an dem Ventilgehäuse angebracht werden müsste.In a second preferred embodiment, only one vent opening is present, which is closed by the top of a transverse wall carrying it from a closing body, wherein in a particularly preferred embodiment, the vent opening has different opening contours. The opening contour on the side facing the sealing element of the transverse wall penetrated by the vent opening is designed as described above, whereby a rapid reopening of the vent opening is ensured. The opening contour on the other side, the top of the transverse wall, however, is circular, so that it can be closed by a closing ball. In contrast to the former embodiment, no two separate transverse walls are thus required, whereby the manufacturing and assembly costs are reduced. A valve housing with a transverse wall, which is penetrated by a preferably two different opening contours having vent opening, can be produced in a simple manner as an injection molded part. In contrast, a housing with two axially spaced, each carrying an opening transverse walls would not be produced so that one of the two transverse walls would have to be attached as a separate part to the valve housing.
Vorzugsweise ist die Entlüftungsöffnung hinsichtlich der oben erwähnten gedachten Mittelebene spiegelsymmetrisch ausgestaltet. Dadurch ist gewährleistet, dass das Dichtelement auf beiden Seiten der Ebene vom Tankinnendruck mit der gleichen Kraft beaufschlagt ist und dementsprechend der sich von der Entlüftungsöffnung in Öffnungsrichtung weg bewegende Schwimmer gleichmäßig belastet und ein Verkippen gegenüber seiner Mittellängsachse verhindert ist. Eine ungleichmäßige Belastung des Schwimmers birgt die Gefahr in sich, dass er sich im Ventilgehäuse verklemmt.Preferably, the vent opening is designed mirror-symmetrically with respect to the above-mentioned imaginary center plane. This ensures that the sealing element is acted upon by the same internal force on both sides of the plane of the tank internal pressure and, accordingly, evenly charged from the vent in the opening direction moving float and tilting with respect to its central longitudinal axis is prevented. An uneven load The float carries the risk of jamming in the valve body.
Die Erfindung wird nun unter Bezugnahme auf die beigefügten Abbildungen näher erläutert. Es zeigen:
- Fig. 1
- ein Entlüftungsventil in teilweise geschnittener perspektivischer Längsschmitt-Darstellung,
- Fig. 2
- einen Querschnitt entsprechend Linie II-II in
Fig. 1 , - Fig. 3
- einen Querschnitt entsprechend Linie III-III in
Fig. 1 , - Fig. 4
- einen Mittellängsschnitt durch das Entlüftungsventil von
Fig. 1 , - Fig. 5
- den Ausschnitt V in
Fig. 4 , - Fig. 6
- bis 9 Längsschnittdarstellungen, welche den Öffnungsvorgang des Entlüftungsventils von
Fig. 1 verdeutlichen, - Fig. 10
- eine Entlüftungsöffnung gemäß Ausschnitt X von
Fig. 2 , - Fig. 11
- und 12 alternativ gestaltete Entlüftungsöffnungen in einer
Fig. 10 entsprechenden Darstellung, - Fig. 13
- den oberen Teil eines alternativ gestalteten Entlüftungsventils in schematischer Längsschnittdarstellung.
- Fig. 1
- a vent valve in a partially cut perspective Längsschmitt representation,
- Fig. 2
- a cross section corresponding to line II-II in
Fig. 1 . - Fig. 3
- a cross section corresponding to line III-III in
Fig. 1 . - Fig. 4
- a central longitudinal section through the vent valve of
Fig. 1 . - Fig. 5
- the section V in
Fig. 4 . - Fig. 6
- to 9 longitudinal sectional views showing the opening operation of the vent valve of
Fig. 1 clarify - Fig. 10
- a vent opening according to section X of
Fig. 2 . - Fig. 11
- and 12 alternatively designed vents in one
Fig. 10 appropriate representation, - Fig. 13
- the upper part of an alternatively designed vent valve in a schematic longitudinal section.
Ein Entlüftungsventil der erfindungsgemäßen Art umfasst, wie am besten
Der Schwimmer 5 ist in Richtung der Mittellängsachse 16 des Gehäuses 2 beweglich gelagert. Zur Axialführung und Drehfixierung des Schwimmers 5 ist in einem oberen Abschnitt von dessen Umfangsfläche wenigstens eine Axialnut 17 vorhanden, in welche eine Axialleiste (nicht gezeigt) an der Innenseite des unteren Gehäuseteils 6 eingreift. Die Oberseite 18 des Schwimmers 5 ist im wesentlichen planeben ausgebildet und erstreckt sich quer zur Mittellängsachse 19 des Schwimmers. Der Schwimmer 5 weist eine zentrale, sich in seine Unterseite öffnende Bohrung 20 auf, an deren Grund ein sich axial erstreckender zentraler Führungsstab 23 angeformt ist. Der Führungsstab 23 ragt in einen hohlzylinderförmigen Vorsprung 24 hinein, welcher sich von der Unterseite des Gehäuseteils 6 axial weg erstreckt. Der Vorsprung 24 ist von dem unteren Ende einer Schraubenfeder 25 umgriffen, welche sich mit ihren einen Ende an einer unteren Wand 26 des Gehäuseteils 6 und mit ihrem anderen Ende innerhalb der Bohrung 20 am Schwimmer 5 abstützt.The
Der Gehäuseteil 6 ist oberseits von einer Querwand 27 begrenzt, welche von einer mit dem Anschlussstutzen 11 fluidisch verbundenen Entlüftungsöffnung 28 durchbrochen ist. Diese ist so in der Querwand 27 angeordnet, dass sie von der Mittellängsachse 16 des Gehäuses 2 durchsetzt ist. Die Entlüftungsöffnung 28 wird von einem an der Oberseite 18 des Schwimmers 5 fixierten Dichtelement 29 gesteuert. Das Dichtelement 29 ist eine flexible Membran beispielsweise aus einem polymeren Werkstoff und weist einen Dichtbereich 30 auf, der so bemessen ist, dass er die Entlüftungsöffnung 28 vollständig überdeckt. Die Entlüftungsöffnung 28 ist von einem aus der Unterseite der Querwand 27 axial vorstehenden Dichtsitz 33 umgrenzt. An den Dichtbereich 30 ist ein Fixierabschnitt 34 angeformt, mit dem das Dichtelement 29 am Schwimmer 5 an einer Fixierstelle 35 fixiert ist. Diese befindet sich - in der Draufsicht in Richtung der Mittellängsachse 19 des Schwimmers 5 gesehen - radial außerhalb der Entlüftungsöffnung 28, ist somit exzentrisch hinsichtlich der Mittellängsachse 19 des Schwimmers 5 angeordnet.The
Die Entlüftungsöffnung 28 hat eine von der Kreisform abweichende Öffnungskontur. Um das Wiederöffnen zu erleichtern, d.h. um die Kräfte zu verringern, die am Beginn des Öffnungsvorgangs (
Der verengte Endabschnitt 39 kann - in der Draufsicht entsprechend
In
Ausgehend von der in
Das in den Zeichnungen dargestellte Ventil weist eine Druckhaltefunktion auf. Zur Gewährleistung der Druckhaltefunktion ist eine Schließkugel 45 vorhanden. Die Oberseite der Querwand 27 weist eine trichterförmige, die Schließkugel 45 haltende Vertiefung 46 auf, an deren tiefster Stelle die Entlüftungsöffnung 28 angeordnet ist. Aus der Oberseite der Querwand 27 stehen mehrere in Umfangsrichtung beabstandete etwa radial verlaufende Rippen 21 vor, welche mit Radialabstand vor der Entlüftungsöffnung 28 enden. Anders als die Öffnungskontur der Entlüftungsöffnung auf der dem Schwimmer 5 zugewandten Unterseite der Querwand 27 weist sie an der Oberseite der Querwand 27 eine kreisrunde Öffnungskontur auf. An dieser Öffnungskontur liegt die Schließkugel 45 dichtend an. Das Gewicht der Schließkugel 45 ist so bemessen, dass im Tankinnenraum 9 stets ein gewisser Minimaldruck vorhanden ist. Der Minimaldruck dient dazu, wie weiter oben schon beschrieben, gegen Ende eines Betankungsvorgangs das Abschalten einer Zapfpistole zu ermöglichen. Im Falle einer Öffnungskontur entsprechend
In
Claims (7)
dadurch gekennzeichnet,
dass eine weitere Entlüftungsöffnung (50) vorhanden ist, die von einem schwerkraftbedingt auf ihr ruhenden Schließkörper verschlossen ist und mit der durch den Schwimmer (5) gesteuerten Entlüftungsöffnung (28a) fluidisch verbunden ist.Venting valve according to claim 1,
characterized,
that a further vent opening (50) is provided which is closed by a force of gravity resting on their closing body and with the controlled by the float (5) vent (28a) is fluidly connected.
dadurch gekennzeichnet,
dass als Schließkörper eine Schließkugel (45) vorhanden ist und die Entlüftungsöffnung (50) eine kreisförmige Öffnungskontur aufweist.Bleed valve according to claim 2,
characterized,
in that a closing ball (45) is present as the closing body and the ventilation opening (50) has a circular opening contour.
dadurch gekennzeichnet,
dass die beiden Entlüftungsöffnungen (28a,50) jeweils an einer separaten Querwand (27,49) des Gehäuses (2) angeordnet sind.Vent valve according to claim 2 or 3,
characterized,
that the two vent ports (28a, 50) each connected to a separate transverse wall (27,49) of the housing (2) are arranged.
dadurch gekennzeichnet,
dass die Entlüftungsöffnung (28) eine Querwand (27) des Gehäuses durchsetzt, wobei sie in die vom Schwimmer (5) abgewandte Oberseite der Querwand ausmündet und oberseits von einem schwerkraftbedingt auf ihr ruhenden Schließkörper verschlossen ist.Venting valve according to claim 1,
characterized,
that the vent opening (28) passes through a transverse wall (27) of the housing, wherein it opens into the upper side of the transverse wall facing away from the float (5) and is closed on the upper side by a closing body resting on it by gravity.
dadurch gekennzeichnet,
dass die Entlüftungsöffnung (28) mit einer kreisrunden Öffnungskontur in der Oberseite der Querwand (27) ausmündet und als Schließkörper eine Schließkugel (45) vorhanden ist.Bleed valve according to claim 5,
characterized,
that the vent opening (28) opens with a circular opening contour in the top surface of the transverse wall (27) and as a closing body has a closing ball (45) is present.
dadurch gekennzeichnet,
dass die von der Kreisform abweichende Öffnungskontur der Belüftungsöffnung (28,28a) spiegelsymmetrisch hinsichtlich der Mittelebene (37) ausgestaltet ist.Bleed valve according to one of the preceding claims,
characterized,
that differs from the circular shape of the opening contour of the ventilation opening (28,28a) is designed mirror-symmetrically with respect to the center plane (37).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010030456 DE102010030456A1 (en) | 2010-06-23 | 2010-06-23 | vent valve |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2400192A2 true EP2400192A2 (en) | 2011-12-28 |
Family
ID=44511779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20110168059 Withdrawn EP2400192A2 (en) | 2010-06-23 | 2011-05-30 | Ventilation valve |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110315240A1 (en) |
EP (1) | EP2400192A2 (en) |
CN (1) | CN102297280A (en) |
DE (1) | DE102010030456A1 (en) |
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USD751671S1 (en) * | 2014-02-19 | 2016-03-15 | Watts Water Technologies, Inc. | Screen assembly |
WO2016028659A1 (en) | 2014-08-19 | 2016-02-25 | Eaton Corporation | Weighted flapper and splined orifice plate for vent valve |
CN104265986A (en) * | 2014-09-18 | 2015-01-07 | 陕西法士特齿轮有限责任公司 | Float-type one-way valve for gas-liquid separation |
CN104847939B (en) * | 2015-05-27 | 2017-04-12 | 安徽江淮汽车集团股份有限公司 | Stabilizing and exhausting device for fuel oil |
CN107752715B (en) * | 2016-08-19 | 2020-09-18 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooking device |
DE102020207834A1 (en) | 2020-06-24 | 2021-12-30 | Alfmeier Präzision SE | VENTILATION VALVE WITH IMPACT WALL AS SPLASH PROTECTION |
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2010
- 2010-06-23 DE DE201010030456 patent/DE102010030456A1/en not_active Withdrawn
-
2011
- 2011-01-21 US US13/010,924 patent/US20110315240A1/en not_active Abandoned
- 2011-05-30 EP EP20110168059 patent/EP2400192A2/en not_active Withdrawn
- 2011-06-23 CN CN201110169923A patent/CN102297280A/en active Pending
Non-Patent Citations (1)
Title |
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Also Published As
Publication number | Publication date |
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CN102297280A (en) | 2011-12-28 |
DE102010030456A1 (en) | 2011-12-29 |
US20110315240A1 (en) | 2011-12-29 |
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